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Finding the Fourth Proportional to 461.78, 637.35 and 314.76

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Solution

The fourth proportional to 461.78, 637.35 and 314.76 is: 434.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.78 : 637.35 = 314.76 : x
  2. Step 2: Convert to fraction form
    461.78/637.35 = 314.76/x
  3. Step 3: Cross multiply
    461.78x = 637.35 × 314.76
  4. Step 4: Simplify right side
    461.78x = 200,612.29
  5. Step 5: Solve for x
    x = 200,612.29/461.78
  6. Step 6: Final answer
    x = 434.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.